Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
Assets
Cash and due from banks	$ 172,924	$ 142,152
Interest-bearing bank deposits	154,977	382,459
Cash and cash equivalents	327,901	524,611
Securities available for sale	1,366,442	1,317,386
Loans, net of unearned discounts and deferred fees, including $61,789 and $73,272 of loans covered by FDIC loss share agreements at June 30, 2017 and September 30, 2016, respectively, and $1,049,548 and $1,131,111 of loans and written loan commitments at fair value under the fair value option at June 30, 2017 and September 30, 2016, respectively, and $11,504 and $12,918 of loans held for sale at June 30, 2017 and September 30, 2016, respectively	8,791,852	8,682,644
Allowance for loan and lease losses	(64,214)	(64,642)
Net loans	8,727,638	8,618,002
Premises and equipment, including $5,074 and $8,112 of property held for sale at June 30, 2017 and September 30, 2016, respectively	114,219	118,506
Accrued interest receivable	45,478	49,531
Other repossessed property, including $0 and $106 of property covered by FDIC loss share agreements at June 30, 2017 and September 30, 2016, respectively	9,051	10,282
FDIC indemnification asset	6,985	10,777
Goodwill	739,023	739,023
Core deposits and other intangibles	9,805	11,732
Loan servicing rights	4,530	5,781
Cash surrender value of life insurance policies	29,403	29,166
Net deferred tax assets	44,918	38,346
Other assets	40,791	58,037
Total assets	11,466,184	11,531,180
Deposits
Noninterest-bearing	1,915,560	1,880,512
Interest-bearing	7,043,542	6,724,278
Total deposits	8,959,102	8,604,790
Securities sold under agreements to repurchase	123,851	141,688
FHLB advances and other borrowings	471,719	871,037
Subordinated debentures and subordinated notes payable	108,261	111,873
Fair value of derivatives	18,232	81,515
Accrued interest payable	5,006	4,074
Accrued expenses and other liabilities	47,030	52,812
Total liabilities	9,733,201	9,867,789
Stockholders’ equity
Common stock, $0.01 par value, authorized 500,000,000 shares; 58,761,597 shares issued and outstanding at June 30, 2017 and 58,693,304 shares issued and outstanding at September 30, 2016	587	587
Additional paid-in capital	1,318,061	1,312,347
Retained earnings	419,838	344,923
Accumulated other comprehensive income (loss)	(5,503)	5,534
Total stockholders' equity	1,732,983	1,663,391
Total liabilities and stockholders' equity	$ 11,466,184	$ 11,531,180